package com.jiaertangshi.jiaer.tools.wechat;



import javax.servlet.http.HttpServletRequest;

/**
* @date: 2018/11/28 17:17
* @author: YINLELE
* @description: 获取真实的ip
*/
public class IpAddress {
   /**
    * 获取用户真实IP地址，不使用request.getRemoteAddr()的原因是有可能用户使用了代理软件方式避免真实IP地址,
    * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值
    *
    * @return ip
    */
   public static String getIpAddress(HttpServletRequest request) {
       String ip = request.getHeader("x-forwarded-for");
       if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
           if (ip.indexOf(",") != -1) {
               ip = ip.split(",")[0];
           }
       }
       if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getHeader("Proxy-Client-IP");
       }
       if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getHeader("WL-Proxy-Client-IP");
       }
       if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getHeader("HTTP_CLIENT_IP");
       }
       if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getHeader("HTTP_X_FORWARDED_FOR");
       }
       if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getHeader("X-Real-IP");
       }
       if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getRemoteAddr();
       }
       return ip;
   }
}
